Climate and average weather in Santo Antônio do Sudoeste

In Santo Antônio do Sudoeste, the summers are humid, hot, wet, and partly cloudy and the winters are mild and partly cloudy.

Best: late March to early October

Over the course of the year, the temperature in Santo Antônio do Sudoeste typically varies from 11°C to 29°C, and is rarely below 4°C or above 33°C. January is the hottest month of the year, while June is the coldest.

Based on the travel score, the best time of year to visit Santo Antônio do Sudoeste for warm-weather activities is from late March to early October.

Hottest
Jan
29°
Coldest
Jun
12°
Wettest
Oct
226 mm
Driest
Aug
110 mm
Rain / yr
1973 mm
148 wet days
Daylight
10.4–13.6 h
shortest–longest
Elevation
544 m
26.1°S
Clearest
Aug
42% cloud

Santo Antônio do Sudoeste is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Santo Antônio do Sudoeste weather by month, at a glance

The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.

Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around late March to early October.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Santo Antônio do Sudoeste, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

The hot season lasts 5.0 months, from November 3 to April 3, with daily high temperatures above 27°C. The hottest month of the year in Santo Antônio do Sudoeste is January, with an average high of 29°C and low of 20°C.

The cool season lasts 2.7 months, from May 14 to August 3, with daily high temperatures below 22°C. The coldest month of the year in Santo Antônio do Sudoeste is June, with an average low of 12°C and high of 21°C.

Days typically run about 10°C warmer than nights year-round.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2920
Feb2920
Mar2819
Apr2617
May2213
Jun2112
Jul2111
Aug2313
Sep2515
Oct2617
Nov2818
Dec2919

Average hourly temperature in Santo Antônio do Sudoeste

A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on January afternoons, near 29°C, and coldest before dawn in June, near 12°C.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM

Santo Antônio do Sudoeste weather by month

Every month at a glance. Click a month for its detailed page.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 20°17417.413.44.4
Feb29° / 20°16316.212.94.6
Mar28° / 19°14113.812.25.6
Apr26° / 17°1509.911.46.8
May22° / 13°1739.810.76.8
Jun21° / 12°16910.210.46.5
Jul21° / 11°1358.710.56.9
Aug23° / 13°1107.411.17.6
Sep25° / 15°1731111.86.9
Oct26° / 17°2261412.66.0
Nov28° / 18°16512.913.35.8
Dec29° / 19°19516.613.64.7

Chance of rain

How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.

Santo Antônio do Sudoeste gets about 1973 mm of precipitation a year. On a typical day the chance of rain is often wet, but that rises and falls sharply with the seasons.

The wetter season lasts 4.1 months, from around Nov 22 to Mar 27, peaking in February at about 58% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Aug 19.

October is the wettest month by volume, with 226 mm over about 14 wet days; August is the driest, with 110 mm.

0%10%20%30%40%50%60%70%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetFeb 19 · 58%Aug 19 · 23%
Rain on a day (%)Rain days
Jan5717
Feb5716
Mar4514
Apr3410
May3110
Jun3410
Jul299
Aug247
Sep3611
Oct4614
Nov4313
Dec5317

Monthly rainfall

Over a full year, Santo Antônio do Sudoeste collects about 1973 mm of rain across 148 wet days — roughly 164 mm in an average month.

It doesn’t fall evenly. October is the wettest month with 226 mm, while August is the driest at just 110 mm. The three wettest months alone bring about 30% of the year’s total.

050100150200250JanFebMarAprMayJunJulAugSepOctNovDec174163141150173169135110173226165195
Rainfall (mm)Rain days
Jan17417
Feb16316
Mar14114
Apr15010
May17310
Jun16910
Jul1359
Aug1107
Sep17311
Oct22614
Nov16513
Dec19517

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

How often the daytime sky is clear, partly cloudy or overcast.

In Santo Antônio do Sudoeste, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.

The clearer part of the year begins around July 5 and lasts for 2.7 months, ending around September 23. The clearest month is August, when the sky is clear, mostly clear, or partly cloudy 64% of the time on average.

The cloudier part of the year begins around September 24 and lasts for 5.2 months, ending around March 1. The cloudiest month is October, when it is overcast or mostly cloudy 55% of the time.

0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JanFebMarAprMayJunJulAugSepOctNovDecAug 26 · 66%Oct 14 · 43%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan4951
Feb5149
Mar5644
Apr5743
May5347
Jun5347
Jul5842
Aug6436
Sep5743
Oct4555
Nov5149
Dec4951

Daylight, sunrise and sunset

DaylightNight

Hours of daylight through the year, with sunrise and sunset times.

The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around January 1, brings about 13 h 36 min of light; the shortest, around June 5, only 10 h 24 min — a swing of roughly 3 h 12 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan13.47:008:28
Feb12.97:228:17
Mar12.27:397:50
Apr11.47:547:17
May10.78:096:53
Jun10.48:246:46
Jul10.58:256:56
Aug11.18:077:11
Sep11.87:347:25
Oct12.67:017:39
Nov13.36:417:59
Dec13.66:428:20

Sunny days

How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.

Santo Antônio do Sudoeste averages about 12 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 9 and 17 days.

The sunnier stretch runs 2.9 months, from around Jun 29 to Sep 24. The sunniest month is August, with roughly 16 sunny days (bright).

The greyest month is October, down near 10 sunny days — about 39% fewer than the August peak.

05101520JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightAug 2617 daysOct 149 days
Sunny daysSky
Jan10Mixed
Feb9Mixed
Mar12Mixed
Apr13Mixed
May13Mixed
Jun12Mixed
Jul15Mixed
Aug16Bright
Sep14Mixed
Oct10Mixed
Nov11Mixed
Dec10Mixed

Humidity comfort

DryComfortableHumidMuggyOppressiveMiserable

Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.

Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.

In Santo Antônio do Sudoeste, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 6.6 months, from around October 8 to April 25. The muggiest month is January, when the air feels humid, muggy or worse about 95% of the time.

The most comfortable stretch runs from around April 26 to October 7, and July is the most comfortable month — the air is dry or comfortable 86% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 23 · 90%Jan 27 · 3%oppressivecomfortablehumidmuggydryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
Jan14185523
Feb15185620
Mar2929528
Apr151834312
May38272870
Jun45302220
Jul52341300
Aug49361410
Sep38292850
Oct172136261
Nov122031343
Dec411234715

Wind

Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.

This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.

Wind in Santo Antônio do Sudoeste is steady company: average speeds sit near 10 km/hcalm — in every month of the year, with no meaningful windy or calm season.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmlight breezeAug 15 · 11 km/hMar 4 · 9 km/h
Wind speed (km/h)Feels
Jan9calm
Feb9calm
Mar9calm
Apr9calm
May10calm
Jun10calm
Jul11calm
Aug11calm
Sep11calm
Oct11calm
Nov10calm
Dec9calm

Best time to visit Santo Antônio do Sudoeste

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Santo Antônio do Sudoeste throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around mid April, Santo Antônio do Sudoeste is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.

Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.

The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Santo Antônio do Sudoeste for general outdoor tourist activities is from late March to early October, with a peak score in the last week of August.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationAug 23 · 7.8

The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Travel score (0–10)Rating
Jan4.5fair
Feb4.6fair
Mar5.6good
Apr6.8good
May6.8good
Jun6.5good
Jul6.9good
Aug7.6ideal
Sep6.9good
Oct6.0good
Nov5.8good
Dec4.7fair

The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Santo Antônio do Sudoeste for hot-weather activities is from early August to mid May, with a peak score in the last week of August.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timebeach/pool scoretemperaturecloudsprecipitationAug 29 · 6.6

The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

What to pack for Santo Antônio do Sudoeste, by month

EssentialRecommendedOptional

Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.

For a warm-season trip around January (highs near 29°C), the essentials are light clothes, rain gear and sun protection. In the cold season around June (highs near 21°C), pack rain gear.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In January, Santo Antônio do Sudoeste sees daytime highs around 29°C and nights near 20°C. Pack light clothes, rain gear and sun protection. About 17 days see rain.

UV index (midday) in Santo Antônio do Sudoeste by month

LowModerateHighVery highExtreme

Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.

Under clear skies, the midday UV index in Santo Antônio do Sudoeste peaks around January 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 5 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 22UV 15Jul 10UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May6High
Jun5Moderate
Jul5Moderate
Aug6High
Sep7High
Oct10Very high
Nov12Extreme
Dec13Extreme

Average hourly UV index in Santo Antônio do Sudoeste

LowModerateHighVery highExtreme

Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.

The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

UV falls off far faster than brightness as the sun drops, so even in January the burn window is concentrated in the middle of the day: about 9 hours a day reach index 3 (protection recommended), and 7.5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM
UV ≥ 3 (h/day)UV ≥ 6 (h/day)
Jan97.5
Feb8.57
Mar86
Apr6.54
May5.50
Jun4.50
Jul4.50
Aug5.51
Sep6.53
Oct7.55
Nov8.56.5
Dec97

Air quality in Santo Antônio do Sudoeste by month

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly average.

Air quality in Santo Antônio do Sudoeste is worst in September — around 24 µg/m³ PM2.5 (moderate), about 4.1× the cleanest month (March, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1023 µg/m³Mar 176 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar6Good
Apr7Good
May6Good
Jun6Good
Jul10Good
Aug22Moderate
Sep24Moderate
Oct12Good
Nov9Good
Dec7Good
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Santo Antônio do Sudoeste is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecfrost-free year round
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr1000
May1000
Jun1000
Jul990
Aug1000
Sep1000
Oct1000
Nov1000
Dec1000

Growing degree days

Degree days (base 10°C)Frost-free shaded

Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Santo Antônio do Sudoeste banks about 3,947 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around January.

01,0002,0003,0004,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan452
Feb399
Mar419
Apr335
May238
Jun195
Jul190
Aug251
Sep293
Oct356
Nov381
Dec436

Solar energy

Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.

Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.

Santo Antônio do Sudoeste receives about 4.8 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.8 and 6.3 kWh/m².

The brighter stretch of the year lasts 6.4 months, from around Sep 14 to Mar 28. The brightest month is November, averaging about 6.1 kWh/m² (intense).

The dimmest month is June, down near 2.9 kWh/m² — roughly 53% less than the November peak.

01234567JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseNov 286.3 kWhJun 232.8 kWh
Solar energy (kWh/m²)Level
Jan6.2Intense
Feb5.7Bright
Mar5.1Bright
Apr4.3Bright
May3.3Moderate
Jun2.9Moderate
Jul3.2Moderate
Aug4.1Bright
Sep4.8Bright
Oct5.4Bright
Nov6.2Intense
Dec6.3Intense

Where is Santo Antônio do Sudoeste?

Santo Antônio do Sudoeste sits at 26.1°S, 53.7°W, 544 m above sea level, in Brazil. The nearest listed city is Dionísio Cerqueira, 22 km away.

Topography around Santo Antônio do Sudoeste

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santo Antônio do Sudoeste.

Within 3 km, the terrain around Santo Antônio do Sudoeste has only modest variations in elevation — a maximum elevation change of 166 m around an average of 555 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 435 m; within 80 km, large variations in elevation — a maximum elevation change of 810 m.

The land around Santo Antônio do Sudoeste is covered by trees (43%) and cropland (22%) within 3 km, trees (55%) and cropland (30%) within 16 km, and trees (67%) within 80 km.

3 km
166 m
16 km
435 m
80 km
810 m
treesgrasslandcroplandartificial surfaceswater
Nearby: Dionísio Cerqueira 22 km · Ampére 31 km · Realeza 39 km · Capanema 45 km · Salto do Lontra 53 km · Francisco Beltrão 67 km · Marmeleiro 70 km · San Pedro 72 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Santo Antônio do Sudoeste (-26.0736°, -53.7253°, elevation 544 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).